Sealed reinforced heat exchange plate and heat exchanger

Abstract

The present application provides a sealed reinforced heat exchange plate and heat exchanger, comprising: a plate body, a sealing area provided on the outer periphery, a flow guide area provided at each end of the plate body, a heat exchange area provided between the two flow guide areas, and a reinforcement area provided between the heat exchange area and the sealing area; a plurality of first flow channels are longitudinally arranged side by side in the heat exchange area, the first flow channels include a first wave crest and a first wave trough of equal width, a plurality of second flow channels are longitudinally arranged side by side in the reinforcement area, the second flow channels include a second wave crest and a second wave trough of equal width, the second flow channels are connected to the first flow channels, and the width of the second wave crest is greater than the width of the first wave crest. The sealed reinforced heat exchange plate and heat exchanger provided in the present application have a simple structure. By providing a reinforcement area between the heat exchange area and the sealing area, the sealing effect of the sealing area is improved from the inside of the plate body, the plate body has a strong ability to resist deformation under pressure and has a long service life.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchange plates, and in particular to a sealed and reinforced heat exchange plate and a heat exchanger. Background Art

[0002] The gasket-type detachable plate heat exchanger is composed of multiple stacked and offset heat exchange plates, forming flow channels for cold and hot fluids between the heat exchange plates to achieve heat exchange between the cold and hot fluids. It has a simple structure, high heat transfer efficiency, and easy maintenance. Its application fields are becoming increasingly wide, especially in the field of high-pressure heating. Higher requirements are placed on the sealing performance of gasket-type detachable plate heat exchangers. Leakage caused by displacement of the sealing gasket due to deformation of the sealing groove is a common problem of sealing failure. In the existing technology, only the structure and material of the sealing groove, sealing gasket and sealing outer edge package are considered to improve the sealing effect of the heat exchange plate. However, the influence of the heat exchange area structure near the sealing groove on the sealing performance is ignored. As a result, the sealing groove has low compressive deformation resistance, poor sealing effect of the heat exchange plate, and short service life. Summary of the Invention

[0003] In view of this, the purpose of this application is to propose a sealed and reinforced heat exchange plate and a heat exchanger to solve the related problems mentioned in the background technology.

[0004] In a first aspect of the present application, a sealed reinforced heat exchange plate is provided, comprising: a plate body, a sealing area is provided on the outer periphery, a guide area is provided at each end of the plate body, the guide area is located on the inner side of the sealing area, a heat exchange area is provided between the two guide areas, and a reinforcement area is provided between the heat exchange area and the sealing area; a plurality of first flow channels are provided in parallel along the longitudinal direction of the plate body in the heat exchange area, the first flow channel includes a first wave crest and a first wave trough of equal width, a plurality of second flow channels are provided in parallel along the longitudinal direction of the plate body in the reinforcement area, the second flow channel includes a second wave crest and a second wave trough of equal width, the second flow channel is connected to the first flow channel, and the width of the second wave crest is greater than the width of the first wave crest.

[0005] Furthermore, the included angle of the first wave trough is equal to the included angle of the second wave trough, the included angle between the first flow channel and the longitudinal direction of the plate is β1, the included angle between the second flow channel and the longitudinal direction of the plate is β2, and β1<β2≤90 degrees.

[0006] Furthermore, the pitch of the first flow channel is equal to the pitch of the second flow channel, and the angle of the first wave valley is greater than the angle of the second wave valley.

[0007] Furthermore, the angle of the first wave trough is greater than the angle of the second wave trough, the angle between the first flow channel and the longitudinal direction of the plate is β1, the angle between the second flow channel and the longitudinal direction of the plate is β2, and β1<β2≤90 degrees.

[0008] Furthermore, the sealing area includes a sealing groove and a sealing outer edge package, the sealing groove is located on the outside of the reinforcement area, and the sealing outer edge package is located on the outside of the sealing groove.

[0009] Furthermore, the sealed outer edge package is a corrugated sealed outer edge package, including a third wave crest and a third wave valley of equal width.

[0010] Furthermore, the first flow channel is a herringbone flow channel, and the corrugation angle 2β1 of the first flow channel is 40-150 degrees.

[0011] In a second aspect of the present application, a heat exchanger is provided, comprising: alternately stacked first heat exchange plates and second heat exchange plates, wherein the first heat exchange plates are the sealed reinforced heat exchange plates described in the first aspect above, and the second heat exchange plates are obtained by vertically rotating the first heat exchange plates 180 degrees around the center of the first heat exchange plates.

[0012] Furthermore, the first heat exchange plate and the second heat exchange plate offset each other to form multiple rows of first contact portions in the heat exchange area and at least one row of second contact portions in the reinforcement area, and the area of ​​the second contact portions is greater than that of the first contact portions.

[0013] Furthermore, a width of the reinforcement area is greater than a transverse distance between two adjacent columns of the first contact portions and the second contact portions.

[0014] As can be seen from the above, the sealed reinforced heat exchange plate and heat exchanger provided by the present application have an additional reinforced area between the heat exchange area and the sealing area, the heat exchange area is provided with a first flow channel, and the reinforced area is provided with a second flow channel, the second flow channel is connected to the first flow channel, so that the number of flow channels in contact with the sealing area remains unchanged, ensuring that the number of contact portions formed in the reinforced area after the heat exchange plates are stacked remains unchanged; the peak width of the second flow channel is greater than the peak width of the first flow channel, so that the area of ​​the contact portion formed in the reinforced area after the heat exchange plates are stacked is increased, and the area of ​​the contact portion formed in the reinforced area is greater than that formed in the heat exchange area The area of ​​the contact part is increased, the local pressure of a single contact part is reduced, and the compressive deformation resistance of the sealing area is improved from the inside of the plate body, thereby improving the sealing effect of the heat exchange plate; the peak width of the second flow channel is increased, thereby increasing the cross-sectional area of ​​the second flow channel, further preventing fouling or blockage during the flow of the fluid in the second flow channel of the reinforced area, and improving the service life; the seal-reinforced heat exchange plate and heat exchanger have a simple structure, and by arranging a reinforced area between the heat exchange area and the sealing area, the sealing effect of the sealing area is improved from the inside of the plate body, the plate body has strong compressive deformation resistance and a long service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 This is a schematic diagram of the structure of a common heat exchanger;

[0017] Figure 2 for Figure 1 Perspective view of area I;

[0018] Figure 3 for Figure 1 Schematic diagram of the three-dimensional structure of the middle I region;

[0019] Figure 4 This is a structural schematic diagram of a sealed reinforced heat exchange plate according to an embodiment of the present application;

[0020] Figure 5 for Figure 4 Enlarged schematic diagram of the middle II region;

[0021] Figure 6 is a schematic cross-sectional view of the first flow channel;

[0022] Figure 7 is a schematic cross-sectional view of the second flow channel;

[0023] Figure 8 It is a cross-sectional schematic diagram of a sealed outer bag;

[0024] Figure 9 This is a schematic structural diagram of a heat exchanger according to an embodiment of the present application;

[0025] Figure 10 for Figure 9 Perspective view of the middle III area;

[0026] Figure 11 for Figure 9 Schematic diagram of the three-dimensional structure of the middle III region.

[0027] Figure markings: 1. Plate body; 1-1. Corner hole; 2. Sealing area; 2-1. Sealing groove; 2-2. Sealing outer edge package; 2-3. Third wave peak; 2-4. Third wave valley; 2-5. Sealing gasket; 3. Guide area; 4. Heat exchange area; 4-1. First flow channel; 4-2. First wave peak; 4-3. First wave valley; 5. Reinforcement area; 5-1. Second flow channel; 5-2. Second wave peak; 5-3. Second wave valley; 6. First heat exchange plate; 7. Second heat exchange plate; 8. First contact portion; 8-1. Outermost row of first contact portions; 9. Second contact portion; 10. Third contact portion. DETAILED DESCRIPTION

[0028] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] The gasket-type detachable plate heat exchanger is composed of multiple stacked and offset heat exchange plates. Flow channels for cold and hot fluids can be formed between the heat exchange plates to achieve heat exchange between the cold and hot fluids. It has a simple structure, high heat transfer efficiency, and easy maintenance. Its application areas are becoming increasingly wide. The sealing of the cold and hot flow channels is achieved by elastic sealing gaskets nested in the sealing groove under the action of pre-tightening force. Especially in the field of high-pressure heating, higher requirements are placed on the sealing performance of the gasket-type detachable plate heat exchanger. Leakage caused by the displacement of the sealing gasket due to deformation of the sealing groove is a common problem of sealing failure.

[0031] like Figure 1 The figure shows a schematic diagram of the structure of a common heat exchanger, which includes stacked heat exchange plates. A sealing area 2 is provided on the outer periphery of the heat exchange plate, and a guide area 3 is provided at both ends. The guide area 3 is located inside the sealing area 2. A heat exchange area 4 is provided between the two guide areas 3. The heat exchange area 4 is connected to the sealing area 2. Figure 3 Shown Figure 1Schematic diagram of the three-dimensional structure of area I in the middle, the heat exchange area 4 is provided with multiple first flow channels 4-1, the sealing area 2 includes a sealing groove 2-1 and a sealing outer package 2-2, a sealing gasket 2-5 is provided in the sealing groove 2-1, and the heat exchange plate is sealed by pressing the sealing gasket 2-5 with the heat exchange plate. In the existing technology, only the structure and material of the sealing groove 2-1, the sealing gasket 2-5 and the sealing outer package 2-2 are considered to improve the sealing effect of the heat exchange plate, but the influence of the structure of the heat exchange area 4 near the sealing groove 2-1 on the sealing performance is ignored. For example, when there is a pressure difference between the cold and hot sides, the contact of the heat exchange area 4 will be deformed due to the pressure difference, which will cause the sealing groove 2-1 to deform and reduce the sealing ability of the heat exchange plate.

[0032] like Figure 2 Shown Figure 1 In the perspective view of area I, the first flow channels 4-1 on adjacent heat exchange plates abut against each other to form a first contact portion 8, and the sealing outer edge package 2-2 abuts against each other to form a third contact portion 10. The first contact portion 8 and the third contact portion 10 provide support. The sealing groove 2-1 mainly relies on the third contact portion 10 and the outermost row of first contact portions 8-1 to compress the sealing gasket 2-5, maintain the shape and structure of the sealing groove 2-1, and ensure the sealing effect on the heat exchange plate. The first contact portion 8 is subject to design limitations such as the pitch and angle of the first flow channels 4-1. For example, a smaller pitch of the first flow channels 4-1 is usually designed to increase the effective heat exchange area. This results in a shorter peak and trough width of the first flow channels 4-1, resulting in a smaller area of ​​the first contact portion 8. The smaller the area of ​​the first contact portion 8, the greater the local pressure. When the heat exchange plate assembly is subjected to a pressure difference, the sealing groove 2-1 and the plates on both sides of the sealing groove 2-1 are deformed more, the compression rate of the sealing gasket 2-5 becomes more uneven, and the sealing gasket 2-5 is easily displaced, resulting in poor sealing effect.

[0033] In the process of implementing this application, it was found that the sealing groove 2-1 in the heat exchange zone 4 mainly relies on the outermost row of first contact parts 8-1 to maintain its shape structure. It is possible to consider adding a reinforcement area between the heat exchange zone 4 and the sealing zone 2, and specially designing the flow channel of the reinforcement area to increase the area of ​​the contact part in the reinforcement area, thereby improving the pressure resistance and deformation resistance of the sealing groove 2-1, thereby improving the sealing effect, and at the same time ensuring that the flow channel in the heat exchange zone 4 remains unchanged, thereby ensuring the heat exchange effect of the heat exchange zone 4.

[0034] Below, through specific embodiments and combined Figures 4 to 11 To describe the technical solution of this application in detail.

[0035] In some embodiments of the present application, a seal-enhanced heat exchange plate is provided, such as Figures 4 to 7As shown, it includes: a plate body 1, a sealing area 2 is provided on the outer periphery, a guide area 3 is provided at each end of the plate body 1, the guide area 3 is located on the inner side of the sealing area 2, a heat exchange area 4 is provided between the two guide areas 3, and a reinforcement area 5 is provided between the heat exchange area 4 and the sealing area 2; a plurality of first flow channels 4-1 are provided in parallel along the longitudinal direction of the plate body 1 in the heat exchange area 4, the first flow channel 4-1 includes a first wave crest 4-2 and a first wave valley 4-3 with equal width, a plurality of second flow channels 5-1 are provided in parallel along the longitudinal direction of the plate body 1 in the reinforcement area 5, the second flow channel 5-1 includes a second wave crest 5-2 and a second wave valley 5-3 with equal width, the second flow channel 5-1 is connected to the first flow channel 4-1, and the width of the second wave crest 5-2 is greater than the width of the first wave crest 4-2.

[0036] The longitudinal direction of the plate body 1 is the length direction of the plate body 1, and the transverse direction of the plate body 1 is the width direction of the plate body 1. The outer periphery of the plate body 1 is provided with a sealing area 2 for sealing between the heat exchange plates. The four corners of the plate body 1 are provided with corner holes 1-1, and the two ends are provided with guide areas 3. The heat exchange area 4 is provided between the guide areas 3. Figure 4 On the heat exchange plate display surface shown, the fluid can flow in from the upper corner hole 1-1, pass through the upper guide area 3, the heat exchange area 4 and the lower guide area 3, and then flow out from the lower corner hole 1-1. In the figure, L is the longitudinal center line of the plate body 1.

[0037] The heat exchange area 4 is connected to the guide area 3. A reinforcement area 5 is provided between the heat exchange area 4 and the sealing area 2. The heat exchange area 4 is connected to the reinforcement area 5. The thickness of the heat exchange area 4, the reinforcement area 5 and the sealing area 2 are consistent to ensure the sealing effect of the heat exchange plate. Figure 5 Shown Figure 4 In the enlarged schematic diagram of the middle II area, a plurality of first flow channels 4-1 are arranged in parallel along the longitudinal direction in the heat exchange area 4. The first flow channels 4-1 are inclined flow channels, such as herringbone flow channels, and are not specifically limited. A plurality of second flow channels 5-1 are arranged in parallel along the longitudinal direction in the reinforcement area 5. The second flow channels 5-1 are connected to the first flow channels 4-1, so that the number of flow channels in contact with the sealing area 2 remains unchanged, ensuring that the number of contact portions formed in the reinforcement area 5 after the heat exchange plates are stacked remains unchanged, as shown in FIG. Figure 9 Shown Figure 4 The heat exchanger is formed by stacking the heat exchange plates. Figure 10 for Figure 9 From the perspective view of area III, it can be seen that the number of second contact portions 9 formed in a row by adjacent heat exchange plates in the reinforcement area 5 remains unchanged, and is the same as the number of first contact portions 8 formed in a row by adjacent heat exchange plates at corresponding positions in the heat exchange area 4.

[0038] Figure 6 for Figure 5A schematic cross-sectional view of the first flow channel 4-1 at point A, wherein the first flow channel 4-1 includes a first wave crest 4-2 and a first wave valley 4-3. The width of the first wave crest 4-2 is d1', and the width of the first wave valley 4-3 is d1, where d1'=d1; Figure 7 for Figure 5 The cross-sectional diagram of the second flow channel 5-1 at point B in FIG. 3 shows three possible forms of the second flow channel 5-1. Each second flow channel 5-1 includes a second wave crest 5-2 and a second wave valley 5-3. The width of the second wave crest 5-2 is d2', and the width of the second wave valley 5-3 is d2, where d2'=d2. The width d2' of the second wave crest 5-2 is greater than the width d1' of the first wave crest 4-2, so that the area of ​​the contact portion formed in the reinforced area 5 after the heat exchange plates are stacked is increased, and the area of ​​the contact portion formed in the reinforced area 5 is greater than the area of ​​the contact portion formed in the heat exchange area 4. Figure 10 As shown, because the width of the second wave peak 5-2 is greater than the width of the first wave peak 4-2, the area of ​​the second contact portion 9 is greater than the area of ​​the first contact portion 8. The larger the contact area, the smaller the local pressure. This can improve the compressive deformation resistance of the sealing area 2 from the inner side of the plate body 1 and improve the sealing effect of the heat exchange plate.

[0039] The width of the second wave peak 5-2 is greater than the width of the first wave peak 4-2, so that the cross-sectional area of ​​the second flow channel 5-1 is greater than the cross-sectional area of ​​the first flow channel 4-1. Then, the resistance encountered by the fluid when flowing to the reinforced area 5 is reduced, thereby avoiding the formation of a heat transfer dead zone in the reinforced area 5, preventing scaling or blockage in the reinforced area 5, and improving the service life.

[0040] A reinforcement area 5 is added between the heat exchange area 4 and the sealing area 2. By designing the second flow channel 5-1 of the reinforcement area 5, the area of ​​the second contact portion 9 formed in the reinforcement area 5 is increased. The larger the area of ​​the second contact portion 9, the smaller the local pressure. When subjected to a pressure difference, the smaller the deformation of the sealing groove 2-1 and the plates on both sides of the sealing groove 2-1, the more uniform the compression rate of the sealing gasket 2-5, and the sealing gasket 2-5 is not easy to shift, thereby improving the pressure-resistant deformation capacity of the sealing groove 2-1 and further improving the sealing effect. At the same time, it ensures that the first flow channel 4-1 of the heat exchange area 4 remains unchanged, thereby ensuring the heat exchange effect of the heat exchange area 4.

[0041] The seal-reinforced heat exchange plate has a simple structure. By setting a reinforcement area 5 between the heat exchange area 4 and the sealing area 2, the sealing effect of the sealing area 2 is improved from the inside of the plate body 1. The plate body 1 has strong pressure resistance and deformation resistance and a long service life.

[0042] In some embodiments, as Figure 5 、 Figure 6 and Figure 7As shown in (a), the angle between the first wave valley 4-3 and the second wave valley 5-3 is equal, the angle between the first flow channel 4-1 and the longitudinal direction of the plate body 1 is β1, the angle between the second flow channel 5-1 and the longitudinal direction of the plate body 1 is β2, and β1<β2≤90 degrees.

[0043] like Figure 6 As shown, the included angle of the first wave valley 4 - 3 is θ1, and the pitch of the first flow channel 4 - 1 is D1. The pitch may be the center distance between two adjacent wave peaks, which is not specifically limited.

[0044] like Figure 7 (a) shows a cross-sectional schematic diagram of the first form of the second flow channel 5-1. The angle of the second trough 5-3 is θ2, θ2 = θ1, which does not change the inclination of the peaks and troughs, making it easy to process and manufacture. The pitch of the second flow channel 5-1 is D2.

[0045] like Figure 5 As shown, the angle between the first flow channel 4-1 and the longitudinal direction of the plate body 1 is β1, β1 is an acute angle, and the angle between the second flow channel 5-1 and the longitudinal direction of the plate body 1 is β2, β1<β2≤90 degrees, for example, β1=27.5 degrees, β2=36.5 degrees, β1=33 degrees, β2=48 degrees or β1=60 degrees, β2=80 degrees, etc., without specific limitation, β1:β2 can be equal to 1 / 2, 2 / 3 or 3 / 4, etc., for better sealing effect.

[0046] The first flow channel 4-1 and the second flow channel 5-1 are connected. By setting β1<β2, D2>D1. Under the condition of θ2=θ1, the width of the second wave peak 5-2 is greater than the width of the first wave peak 4-2, thereby increasing the area of ​​the second contact portion 9 and improving the sealing effect.

[0047] When β2=90 degrees, the second flow channel 5-1 is arranged horizontally, and the area of ​​the formed second contact portion 9 is the largest, which has the best sealing effect on the heat exchange plate. However, the fluid is difficult to flow longitudinally in the second flow channel 5-1, which will reduce the heat exchange effect of the heat exchange plate.

[0048] In some embodiments, as Figure 6 and Figure 7 As shown in (b), the pitch of the first flow channel 4-1 is equal to the pitch of the second flow channel 5-1, and the angle of the first wave valley 4-3 is greater than the angle of the second wave valley 5-3.

[0049] like Figure 6 As shown, the included angle of the first wave valley 4 - 3 is θ1, and the pitch of the first flow channel 4 - 1 is D1. The pitch may be the center distance between two adjacent wave peaks, which is not specifically limited.

[0050] like Figure 7(b) shows a cross-sectional schematic diagram of the second form of the second flow channel 5-1. The pitch of the second flow channel 5-1 is D2, D2=D1, and the angle of the second wave valley 5-3 is θ2, θ2<θ1. Under the condition that the pitch remains unchanged, by setting θ2<θ1, the width of the second wave peak 5-2 is greater than the width of the first wave peak 4-2, thereby increasing the area of ​​the second contact portion 9 and thereby improving the sealing effect.

[0051] In some embodiments, as Figure 5 、 Figure 6 and Figure 7 As shown in (c), the angle of the first wave valley 4-3 is greater than the angle of the second wave valley 5-3, the angle between the first flow channel 4-1 and the longitudinal direction of the plate body 1 is β1, and the angle between the second flow channel 5-1 and the longitudinal direction of the plate body 1 is β2, β1<β2≤90 degrees.

[0052] like Figure 6 As shown, the included angle of the first wave valley 4 - 3 is θ1, and the pitch of the first flow channel 4 - 1 is D1. The pitch may be the center distance between two adjacent wave peaks, which is not specifically limited.

[0053] like Figure 7 (c) shows a cross-sectional view of the third type of the second flow channel 5-1. The angle of the second wave valley 5-3 is θ2, θ2<θ1, and the pitch of the second flow channel 5-1 is D2.

[0054] like Figure 5 As shown, the angle between the first flow channel 4-1 and the longitudinal direction of the plate body 1 is β1, and the angle between the second flow channel 5-1 and the longitudinal direction of the plate body 1 is β2, β1<β2≤90 degrees, the first flow channel 4-1 and the second flow channel 5-1 are connected, and by setting β1<β2, D2>D1, and at the same time, under the condition of θ2<θ1, the width of the second wave peak 5-2 is much larger than the width of the first wave peak 4-2, thereby increasing the area of ​​the second contact portion 9 and thereby improving the sealing effect.

[0055] When β2=90 degrees, the second flow channel 5-1 is arranged horizontally, and the area of ​​the formed second contact portion 9 is the largest, which has the best sealing effect on the heat exchange plate. However, the fluid is difficult to flow longitudinally in the second flow channel 5-1, which will reduce the heat exchange effect of the heat exchange plate.

[0056] In some embodiments, as Figure 5 As shown, the sealing area 2 includes a sealing groove 2-1 and a sealing outer edge package 2-2. The sealing groove 2-1 is located outside the reinforcement area 5, and the sealing outer edge package 2-2 is located outside the sealing groove 2-1.

[0057] A sealing gasket 2-5 can be provided in the sealing groove 2-1. By applying pressure to the sealing outer edge package 2-2 and the reinforcement area 5 of the adjacent heat exchange plate, the sealing gasket 2-5 is compressed to achieve sealing of the heat exchange plate.

[0058] In some embodiments, as Figure 5 and Figure 8 As shown, the sealed outer edge package 2-2 is a corrugated sealed outer edge package, including a third wave crest 2-3 and a third wave valley 2-4 of equal width.

[0059] like Figure 8 As shown, Figure 5 The cross-sectional view of the middle sealed outer package 2-2 at C shows that the width of the third wave crest 2-3 is d3', the width of the third wave valley 2-4 is d3, d3'=d3, and the corrugation pitch is D3. Figure 5 As shown, the third wave crest 2-3 and the third wave trough 2-4 are arranged transversely perpendicular to the sealing groove 2-1. Since the sealing outer edge package 2-2 has nothing to do with the fluid heat exchange, the angle of the third wave trough 2-4 can be reduced. Under the condition of a fixed corrugation pitch, the width of the third wave crest 2-3 and the third wave trough 2-4 is increased, thereby increasing the contact area of ​​the third contact portion 10 formed by adjacent heat exchange plates and improving the sealing effect.

[0060] In some embodiments, as Figure 4 As shown, the first flow channel 4 - 1 is a herringbone flow channel, and the corrugation angle of the first flow channel 4 - 1 is 40-150 degrees.

[0061] like Figure 4 As shown, the corrugation angle of the first flow channel 4-1 is 2β1, and the range of 2β1 is 40-150 degrees, for example, it can be 40 degrees, 50 degrees, 60 degrees, 70 degrees, 80 degrees, 90 degrees, 100 degrees, 110 degrees, 120 degrees, 130 degrees, 140 degrees or 150 degrees. There is no specific limitation, and the corrugation angle can be selected according to different working conditions to achieve better heat exchange effect.

[0062] In some embodiments of the present application, a heat exchanger is provided, such as Figure 9 As shown, it comprises: first heat exchange plates 6 and second heat exchange plates 7 stacked alternately, wherein the first heat exchange plates 6 are as follows Figures 4 to 8 The seal-enhanced heat exchange plate, the second heat exchange plate 7 is obtained by vertically rotating the first heat exchange plate 6 180 degrees around the center of the first heat exchange plate 6 .

[0063] like Figure 9 In the heat exchanger shown, the solid line heat exchange plate represents the first heat exchange plate 6. The first heat exchange plate 6 is Figure 4 The seal-enhanced heat exchange plate shown; Figure 9 The middle dotted heat exchange plate represents the second heat exchange plate 7. The second heat exchange plate 7 is Figure 4The seal-enhanced heat exchange plate shown is obtained by rotating the plate body 1 vertically by 180 degrees. By stacking the first heat exchange plate 6 and the second heat exchange plate 7, a mesh-like combined flow channel can be formed to improve the heat exchange effect.

[0064] In some embodiments, as Figure 10 and Figure 11 As shown, the first heat exchange plate 6 and the second heat exchange plate 7 are in contact with each other, forming multiple rows of first contact portions 8 in the heat exchange area 4, at least one row of second contact portions 9 in the reinforcement area 5, and a third contact portion 10 in the sealing area 2, and the contact area of ​​each second contact portion 9 is greater than the contact area of ​​each first contact portion 8.

[0065] like Figure 10 and Figure 11 As shown, the first wave valley 4-3 of the first heat exchange plate 6 and the first wave peak 4-2 of the second heat exchange plate 7 are offset to form a first contact portion 8, the second wave valley 5-3 of the first heat exchange plate 6 and the second wave peak 5-2 of the second heat exchange plate 7 are offset to form a second contact portion 9, and the third wave valley 2-4 of the first heat exchange plate 6 and the third wave peak 2-3 of the second heat exchange plate 7 are offset to form a third contact portion 10. Figure 10 It can be seen that the center distance between two adjacent first contact portions 8 in the same column is equal to the center distance between two adjacent second contact portions 9 in the same column, both being D7, indicating that the provision of the reinforcement area 5 does not change the number of original contact portions.

[0066] from Figure 10 It can also be seen that since the width of the second wave peak 5-2 is greater than the width of the first wave peak 4-2, the minimum edge spacing between two adjacent first contact portions 8 in the same column is greater than the minimum edge spacing between two adjacent second contact portions 9 in the same column, and the area of ​​the first contact portion 8 is smaller than the area of ​​the second contact portion 9. The larger the contact area, the smaller the local pressure, and thus the compressive deformation resistance of the sealing area 2 on the inner side of the plate body 1 can be improved, thereby improving the sealing effect of the heat exchange plate.

[0067] By comparison Figure 2 and Figure 10 It can be seen that Figure 10 The closest distance between the edge of the second contact portion 9 and the sealing area 2 is less than Figure 2 The distance between the edge of the outermost row of first contact parts 8-1 and the sealing area 2 is the shortest, and the distance between the edge of the second contact part 9 and the sealing area 2 is even closer, so that the sealing groove 2-1 is evenly stressed and the sealing effect is better.

[0068] The second contact portion 9 may be in one row or multiple rows. As the number of rows of the second contact portion 9 increases, the overall contact area of ​​the second contact portion 9 increases, the sealing effect on the heat exchange plate is enhanced, but the heat exchange effect on the fluid is reduced.

[0069] In some embodiments, as Figure 10 As shown, the width of the reinforcement area 5 is greater than the lateral distance between two adjacent rows of the first contact portions 8 and the second contact portions 9 .

[0070] like Figure 10 As shown, the width of the reinforcement area 5 is D4, and the lateral spacing between two adjacent rows of first contact portions 8 and second contact portions 9 is D5, D4>D5, to ensure that at least one row of second contact portions 9 can be accommodated in the reinforcement area 5. D4 can be 10-50 mm, and there is no specific limitation.

[0071] like Figure 10 As shown, the center distance between two adjacent third contact portions 10 is D6. Since the third wave crest 2-3 and the third wave valley 2-4 are arranged perpendicular to the sealing groove 2-1, D3=D6. D6<D7 can be designed, which makes the compression rate of the sealing gasket 2-5 more uniform and the sealing effect better.

[0072] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0073] In addition, when details are set forth to describe exemplary embodiments of the present application, it will be apparent to those skilled in the art that the present application embodiments can be implemented without these details or with variations in these details. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0074] While the present application has been described in conjunction with the embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0075] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A sealed reinforced heat exchange plate, characterized in that: include: A plate body, with a sealing area provided on the outer periphery, a guide area provided at each end of the plate body, the guide area being located inside the sealing area, a heat exchange area being provided between the two guide areas, a reinforcement area being provided between the heat exchange area and the sealing area, the heat exchange area being connected to the guide area, and the heat exchange area being connected to the reinforcement area; A plurality of first flow channels are arranged in parallel along the longitudinal direction of the plate body in the heat exchange zone, and the first flow channels include a first wave crest and a first wave trough of equal width. A plurality of second flow channels are arranged in parallel along the longitudinal direction of the plate body in the reinforcement zone, and the second flow channels include a second wave crest and a second wave trough of equal width. The second flow channels are connected to the first flow channels, and the width of the second wave crest is greater than the width of the first wave crest.

2. The seal-enhanced heat exchange plate according to claim 1, characterized in that: The included angle of the first wave trough is equal to the included angle of the second wave trough, the included angle between the first flow channel and the longitudinal direction of the plate is β1, the included angle between the second flow channel and the longitudinal direction of the plate is β2, and β1<β2≤90 degrees.

3. The seal-enhanced heat exchange plate according to claim 1, characterized in that: The pitch of the first flow channel is equal to the pitch of the second flow channel, and the included angle of the first wave valley is greater than the included angle of the second wave valley.

4. The seal-enhanced heat exchange plate according to claim 1, characterized in that: The included angle of the first wave trough is greater than the included angle of the second wave trough. The included angle between the first flow channel and the longitudinal direction of the plate is β1, and the included angle between the second flow channel and the longitudinal direction of the plate is β2, β1<β2≤90 degrees.

5. The seal-enhanced heat exchange plate according to claim 1, characterized in that: The sealing area includes a sealing groove and a sealing outer edge package, the sealing groove is located on the outer side of the reinforcement area, and the sealing outer edge package is located on the outer side of the sealing groove.

6. The seal-enhanced heat exchange plate according to claim 5, characterized in that: The sealed outer edge package is a corrugated sealed outer edge package, including a third wave crest and a third wave valley of equal width.

7. The seal-enhanced heat exchange plate according to claim 1, characterized in that: The first flow channel is a herringbone flow channel, and the corrugation angle of the first flow channel is 40-150 degrees.

8. A heat exchanger, characterized in that: include: A first heat exchange plate and a second heat exchange plate are alternately stacked, wherein the first heat exchange plate is a sealed reinforced heat exchange plate as described in any one of claims 1 to 7, and the second heat exchange plate is obtained by vertically rotating the first heat exchange plate 180 degrees around the center of the first heat exchange plate.

9. The heat exchanger according to claim 8, characterized in that The first heat exchange plate and the second heat exchange plate are offset against each other to form multiple rows of first contact portions in the heat exchange area and at least one row of second contact portions in the reinforcement area. The area of ​​the second contact portions is greater than that of the first contact portions.

10. The heat exchanger according to claim 9, characterized in that The width of the reinforcement area is greater than the lateral distance between two adjacent columns of the first contact portions and the second contact portions.

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